A roadside bomb exploded near an Iraqi army convoy on the outskirts of Baghdad on Saturday, killing nine soldiers and wounded 20, police said. When the surviving soldiers responded by opening fire, they shot and killed the driver of a civilian car, said police Lt. Ahmed Abud. The attack occurred about seven kilometers (four miles) from the notorious Abu Ghraib prison, which was at the center of the prison abuse scandal last year after photographs were publicized showing U.S. soldiers humiliating Iraqi inmates. Four other attacks by insurgents occurred in Iraq on Saturday morning. _An Iraqi civilian was killed by a roadside bomb on a highway in Samarra, 95 kilometers (60 miles) north of Baghdad, said police Lt. Qassim Mohamed. _A suicide car bomb exploded near a Shiite mosque in Abu al-Khasib, a town near Basra in southern Iraq, wounding two people, said police Col. Karim al-Zeidi. _In Mosul, 360 kilometers (225 miles) northwest of Baghdad, a roadside bomb hit an Iraqi army convoy, wounding three soldiers, said Dr. Bahaaldin al-Bakri at the city's hospital. _In eastern Baghdad, two policemen were wounded when a roadside bomb hit their car, said police Capt. Mahir Abdelsatar.